Vocab
A molecular compound that contains carbon and other elements and is produced by or makes up the structure of an organism
Organic Substance
The process of _____ breaks down the chemicals in food into nutrients.
Digestion
This happens when toxic chemicals, like DDT, whose remains in the environment are consumed indirectly by organisms through food. When an organism in the higher food chain consumes the lower organism containing such chemicals, the chemicals can get accumulated in the higher organism.
Biomagnification
Used to organize a number of chemical samples into groups of acids and bases
PH paper and PH scale
Weed, insect, and fungus pests can be controlled by applying specific pesticides called? (name all 3 and in the correct order)
herbicides, insecticides, and fungicides.
An element, ionic compound or simple molecular compound that likely does not contain carbon and was not produced by an organism.
Inorganic Substance
Often called fats and are used for long term energy storage
Lipids
It was initially used with great effect to combat malaria, typhus, and the other insect-borne human diseases among both military and civilian populations. It also was effective for insect control in crop and livestock production, institutions, homes, and gardens.
DDT
Chemicals that have a bitter taste or slippery feel
Bases
An alteration of the environment is considered pollution if what happens?
it produces a condition that is harmful to living things.
a substance that is required for an organism's survival or promotes an organism’s health.
Nutrient
Nutrients are classified into these two major groups
Organic and Inorganic
Organic farming pesticides differ from conventional farming pesticides in what way?
Are derived from natural resources
Substances that have a tart taste, like lemons or soft drinks
Acids
Some pollutants are difficult to break down and therefore accumulate in the environment. These are termed what ?
Persistent pollutants
Organic molecules made up of carbon, hydrogen and oxygen that primarily provide immediate energy for organisms.
Carbohydrates
The 3 major classes of organic molecules found in grains, dairy products, and legumes (like brown beans)?
Carbohydrates, lipids, and proteins
DDT is a potent insecticide, especially against mosquitoes. Within a few years, local dogs and cats also died. The result was a population explosion of rats. What does this indicate?
That the populations of these animals depend on each other
Oxides of Carbon, Sulfur and Nitrogen produced in the combustion reaction of fossil fuels can mix with water vapour in the air to produce what?
Acid rain
(learn the chemical reactions that contribute to acid rain on the slides)
The mineral most crucial to red blood cells
iron
substances are that are neither acidic or basic having a pH of exactly 7
Neutral
The nutrients that act mainly as an energy source
Carbohydrates
Name 3 problems Associated with the use of pesticides
Unforeseen consequences - could attack unintended organisms
Persistence - they don't break down
Bioaccumulation or biomagnification
Resistance to use - over time organisms develop a tolerance
Acidic lakes are treated with what to neutralize them?
Lime
Ca(OH)(aq) + H2SO4(aq)→CaSO4(s) + 2H2O(l)
calcium hydroxide + sulfuric acid → calcium sulfate + water
Not related to this unit but just for fun ...
This human body part stays the same size from birth, however, our nose and ears never stop growing.
Eyeballs